fix(usage): carry full filter set in breakdown tables and fix double fetch

- breakdown sub-tables now send all active filters (route/user/api_key), matching the trend chart
- summary tab filters the token trend by user and unions user options from both meta APIs (deduped by id)
- stabilize the filters reference so meta load no longer retriggers a second fetch on mount

src/pages/usage/config/types.ts

@@ -96,3 +96,12 @@ export interface UsageMeta {
 }
 
 export type FilterOptionType = Omit<UsageFilterItem, 'label' | 'deleted'>;
+
+// The full breakdown filter set (route / user / api_key). Every breakdown
+// table sends all active dimensions — matching the trend chart — so e.g. a
+// user filter narrows the Models table too, not only the Users table.
+export type BreakdownFilters = {
+  routes?: FilterOptionType[];
+  users?: FilterOptionType[];
+  api_keys?: FilterOptionType[];
+};